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We present a new space-time encoder based on packet-level redundancy which can increase the space-time encoder rate beyond unity without compromising diversity gains. A complementary low-complexity decoding algorithm based on maximum ratio combining and successive interference cancelation is further proposed. A major merit of the decoding algorithm is that it allows to adaptively tradeoff between...
Ambient-intelligence (AmI) systems raise a series of new challenges in software and system development: Mobility, adaptability and heterogeneity are new concerns that have to be addressed. Many of these concerns are common and therefore should be addressed by a common AmI infrastructure instead of each individual application. This position paper proposes a bottom-up approach for the development of...
A 2.4 GHz wide bandpass filter using the closed loop ring resonator with the compound stub proposed and implemented using microstrip lines, aiming at high level of miniaturization, low cost, low radiation loss, high quality factor and ease of fabrication. The compound stub is connected to the downer path of the loop filter functioning as the capacitance. As the experimental results, it is found that...
The past decade has seen a dramatic change in the manner in which the power industry is organized. In a deregulated environment, Loss Allocation in the transmission lines is one of the most important problem, so a transmission loss allocation (TLA) method for generator and load nodes is presented by considering mathematical formulation between node power and line power flow. The formulation is based...
The past decade has seen a dramatic change in the manner in which the power industry is organized. It has moved from a formerly vertically integrated and highly regulated industry to one that has been horizontally integrated in which the generation, transmission and distribution are unbundled. In a deregulated environment, Congestion in the transmission lines can be relieved by one of the two congestion...
This paper proposes an approach which combines Lagrangian relaxation principle with evolutionary programming and quadratic programming (LREQP) for short-term thermal unit commitment. Unit commitment is a complex combinatorial optimization problem which is difficult to be solved for large-scale power systems. This paper presents a hybrid method for ramp rate constrained unit commitment (RUC) problem...
This paper presents a ant colony search algorithm (ACSA) method for determining the optimal proportional-integral derivative (PID) controller parameters, for speed control of a linear brushless DC motor. The proposed approach has superior features, including easy implementation, stable convergence characteristic and good computational efficiency. The brushless DC motor is modeled in Simulink and the...
The past decade has seen a dramatic change in the manner in which the power industry is organized. It has moved from a formerly vertically integrated and highly regulated industry to one that has been horizontally integrated in which the generation, transmission and distribution are unbundled. In the past, utilities had to produce power to satisfy their customers with objective to minimize costs and...
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